补全句子A：what's （ ）the wall?B:oh,it‘s a picture （ ）my family.A：

答案：
A：what's （ on ）the wall?
B:oh,it‘s a picture （ of ）my family.
A：can i look （ at ）it?
B：certainly.here you are.this is my father and this is my （ mother ）.they are forty（years ）old.
A：oh,they look young .（Who is ）that man between them?
B：he’s my father‘s brother .he’s my （ uncle ）.
A：and that little girl beside you?
B：（ She is ）my sisther .she looks very nice.
A：yes,i （ think ）（ so ）.